Now Foods L-Tryptophan Powder, 2 oz (57 g)
56.7g · Item
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Price history
Best price so far: £22.25 at Iherb on 2 Sept 2026
Close to the typical price of £22.25 over the last 90 days — a drop may be worth waiting for. Set an alert and we'll tell you.
About this product
Supports RelaxationEncourages Positive MoodPromotes Restful SleepNon-GMOA Dietary SupplementVegetarian/VeganAmino AcidsFamily Owned Since 1968GMP Quality AssuredL-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Every lot of NOW® L-Tryptophan is tested to be free of Peak E and microbial contamination.